Dozens of firefighters are working to put out a fire burning at an oil depot in St. Petersburg, Russian authorities said.
Videos of the area posted on social media show a large column of black smoke rising as explosions take place.
The fire was first reported at 10:59 a.m. local time, Russia’s Emergency Situations Ministry said. An 80-by-10-meter (262-by-33-foot) hangar was reported on fire, the ministry said.
Some 100 people have been involved in efforts to put out the fire, which burned an area of about 800 square meters (8,600 square feet).
Russian online news outlet Fontanka reported that the fire broke out at the Ruchi oil depot.
The cause of the incident is not yet known. So far no victims have been reported.
Russian infrastructure, such as oil deposits, have previously been targets of his invasion of Ukraine.